ondavsopaWhat's the difference?

Quick tell: onda is a noun, opa is an intj, so they fill different roles in a sentence.

Which to use

“onda” is a noun and “opa” is an intj - they look or sound alike but fill different roles in a sentence.

#2,059
“onda” frequency rank
#11,690
“opa” frequency rank
13749
confusion score

Side-by-Side Comparison

Feature onda opa
Definition elevação e depressão da camada superficial de uma massa líquida; vaga acusa o reconhecimento de um pequeno erro

Letter map: onda vs opa

Shared letters muted; letters that set onda and opa apart highlighted. Shared run: 2.

4 ch
onda
3 ch
opa

Grammar separator: onda vs opa

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: onda is anoun and opaanintj. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 13749, derived from the frequency rank of both members and their visual similarity.

onda is recorded at frequency rank #2,059, classified as anoun, pronounced /ˈõ.dɐ/. opa is at rank #11,690, tagged as anintj.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 13749, this pair ranks #58,492 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of onda vs opa

Shared letters: ao. Private to "onda": dn. Private to "opa": p.

"onda" · 4 letters · shape VCCV  ·  "opa" · 3 letters · shape VCV

Known mistypes of this pair

  • ondanoda · odna · onad · ondda · onnda

Frequently Asked Questions

Is swapping "onda" for "opa" ever safe?
No - they are not even the same part of speech. "onda" is a noun and "opa" an intj, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "onda" or "opa" show up more?
"onda" is the more common of the two: it sits at frequency rank #2,059 in our Portuguese list, against #11,690 for "opa". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Done with this confusable. These links stay specific to "onda" and "opa".

  • Full dictionary entry for "onda" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "opa" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #58,492 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "onda" and "opa" also get mixed up with nearby pairs, the highest-scored neighbour is "oni vs opa". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #58,492 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list